What's a rating & review system you're using that you wish you implemented sooner?

Our App Reelshot recently hit 1000 5 star reviews. A milestone we're proud of! We wish we had better systems in place much sooner. Currently we prompt after wow moments, hitting just before average engagement time and after a user starts a free trial or goes pro. It's massively important for your Appstore rankings. What are some of your tips for building ratings and reviews?